Evacuate danger area! Consult an expert! Personal protection: complete protective clothing including self-contained breathing apparatus. Ventilation. Do NOT let this chemical enter the environment. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Then store and dispose of according to local regulations. Do NOT absorb in saw-dust or other combustible absorbents.

Physical State; AppearanceCOLOURLESS-TO-PALE-YELLOW SOLID IN VARIOUS FORMS WITH PUNGENT ODOUR.

Physical dangers

Chemical dangersDecomposes on heating. This produces fumes of osmium. The substance is a strong oxidant. It reacts with combustible and reducing materials. Reacts with hydrochloric acid. This produces toxic gas (chlorine - see ICSC 0126). Mixtures with alkalis are unstable.

Routes of exposureThe substance can be absorbed into the body by inhalation of its aerosol or vapour and by ingestion.

Effects of short-term exposureLachrymation. The substance is corrosive to the eyes, skin and respiratory tract. Inhalation may cause lung oedema. See Notes. Exposure to high concentrations could cause death. The effects may be delayed. Medical observation is indicated.

Inhalation riskA harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C.

Effects of long-term or repeated exposureRepeated or prolonged contact with skin may cause dermatitis. The substance may have effects on the kidneys.

Occupational exposure limits

TLV: 0.0002 ppm as TWA; 0.0006 ppm as STEL

ENVIRONMENT

This substance may be hazardous to the environment. Special attention should be given to crustacea.

NOTES

Begins to sublime and distil well below boiling point.The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential.Immediate administration of an appropriate spray, by a doctor or a person authorized by him/her, should be considered.The odour warning when the exposure limit value is exceeded is insufficient.Do NOT take working clothes home.Rinse contaminated clothes (fire hazard) with plenty of water.

ADDITIONAL INFORMATION

EC Classification
Symbol: T+; R: 26/27/28-34; S: (1/2)-7/9-26-45

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